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general::
Phrase(s): have a hunch (that something is the case) [and] have a hunch about something
to have an idea about what did, will, or should happen; to have a feeling that something will or should happen. • I had a hunch that you would be here when I arrived. • I have a hunch about the way things will happen.
McGrawhill's American Idioms And Phrasal Verbs